.change_subject {
  width: 100vw;
  min-height: 100vh;
  background: #f8f8f8;
}
.change_subject .subject_top {
  border-bottom: 25px solid #efefef;
}
.change_subject .subject_top .top {
  height: 500px;
  background: #fff;
  color: #666;
  padding: 80px 40px 0;
  box-sizing: border-box;
}
.change_subject .subject_top .top section {
  display: flex;
  justify-content: space-between;
}
.change_subject .subject_top .top span {
  font-size: 42px;
}
.change_subject .subject_top .top .change {
  color: #2e57ff;
}
.change_subject .subject_top h3 {
  font-size: 80px;
  font-weight: 700;
  color: #2e57ff;
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 400px;
}
.change_subject .subject_top h3 i {
  font-size: 70px;
}
.change_subject .subject_bottom {
  min-height: 100%;
  background: #fff;
  padding: 80px 40px 30px;
  box-sizing: border-box;
}
.change_subject .subject_bottom h3 {
  font-size: 42px;
}
.change_subject .subject_bottom .sub_li {
  font-size: 50px;
  height: 120px;
  background: #f0f0f0;
  text-align: center;
  border-radius: 60px;
  line-height: 120px;
  margin: 30px 0;
}
